Installed 1 7/8 custom hand built LPE headers on my 383 Z,
gains at: 2000 rpm 40 rwtq
3000 rpm 44 rwtq
4000 rpm 40 rwtq
peak rwtq was 412 which was 6 higher, and 200 rpm
peak rwhp was 420 which was 25 higher, also carried to a higher rpm
above peak rwhp 6000 rpm 29 rwhp
6400 rpm 32 rwhp
This header was not cheap, crazy money, thank God they worked, still insane, but what the hell.
